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Estonian Journal of Earth Sciences
ISSN 1736-7557 (Electronic)
ISSN 1736-4728 (Print)
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SHORT COMMUNICATION: Kaljoprion – a new enigmatic jawed polychaete genus from the Upper Ordovician of Estonia; pp. 256–259

Full article in PDF format | 10.3176/earth.2008.4.05

Olle Hints


A new Late Ordovician polychaete genus Kaljoprion, with K. laevaensis gen. et sp. nov. as the type species, is described from the Nabala Regional Stage of the Laeva-18 drill core, central Estonia. The genus has a labidognath-type apparatus with the first and second maxillae equipped with anterior denticles developed into characteristic transversal ridges. Similar dentaries are observed in the jaws of distantly related Rhytiprion, suggesting a common feeding habit of both genera and representing a case of convergent evolution among Palaeozoic polychaetes.



Bergman, C. F., Eriksson, M. E. & Calner, M. 2003. The jawed annelid Rhytiprion magnus Kielan-Jaworowska, 1966 – a muddy bottom dweller. GFF125, 191–199.

Dales, R. P. 1963. Annelids. Hutchinson University Library, London, 200 pp.

Eriksson, M. E., Bergman, C. F. & Jeppsson, L. 2004. Silurian scolecodonts. Review of Palaeobotany and Palynology131, 269–300.

Grube, A. E. 1850. Die Familien der Anneliden. Archiv für Naturgeschichte, Berlin16, 249–364.

Hints, O. 1998. Late Viruan (Ordovician) polychaete jaws from North Estonia and the St. Petersburg Region. Acta Palaeontologica Polonica43, 471–516.

Hints, O. 2000. Ordovician eunicid polychaetes of Estonia and surrounding areas: a review of their distribution and diversification. Review of Palaeobotany and Palynology113, 41–55.

Hints, O. & Eriksson, M. E. 2007. Diversification and bio­geography of scolecodont-bearing polychaetes in the Ordovician. Palaeogeography, Palaeoclimatology, Palaeo­ecology245, 95–114.

Jansonius, J. & Craig, J. H. 1971. Scolecodonts: I. Descriptive terminology and revision of systematic nomenclature; II. Lectotypes, new names for homonyms, index of species. Bulletin of Canadian Petroleum Geology19, 1–251.

Kielan-Jaworowska, Z. 1966. Polychaete jaw apparatuses from the Ordovician and Silurian of Poland and a comparison with modern forms. Palaeontologia Polonica16, 1–152.

Raukas, A. & Teedumäe, A. (eds). 1997. Geology and Mineral Resources of Estonia. Estonian Academy Publishers, Tallinn, 436 pp.


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